1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c2f4823ca666ddbb207639a7e0fd738a5e70b2ad5b23db23ca7b6fe8d21e6c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f8973b0-1753-4150-9dff-be69c4aef07b.json and https://artists.proofprofile.net/proofs/artist/2f8973b0-1753-4150-9dff-be69c4aef07b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d554e7a229957bbd3d186edec51818a1214a976cbaddb2efecd251e03dbdfb2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1608185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2158b91535f5807f2c05b4b8c332ddd372e2d79a471392d4d3e0c67fc96f35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1608480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9851b44870bb563ddb26ec17657d1b8529f2b4310f3a166d94aa5e33836bdb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e668c5552952491290f6e25463c6ebffd5b77be4b36ac69222ce0ae9e7ec3b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9e5f6d62bb046bc14578fdbae891870726ad101d54c096b20903be36bb3204. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4010bbc2710fd43eff49443c529365e69557282800fab56ad2b75b169e3bc50. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219922578aba007effc5cd0f7d8c56a7a65d1ef406dc14c65470e2d0282e805c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b04c9f9bb06b056635ec4ecf2b831f4d18249f2daf7b144a772d00375b0e35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03a33c5d5d5b7a53021076d9133b97554cf6ed7c44320b020bd1876315c0aa3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1875187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0db8a5343897fe729e1224f58468121c0e02cbb35abb2518271b39dd1bf95a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1631035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9092ff46caa890b944a39742106df971ea23cad45919635c79894cd816cdc8f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1628168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e8e0e0ff33ca59b194efd02dec5346f9e3c14459acd7adf970af3f6259618. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1626807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df186f4d83e7ead562dd737f58d05544d02ab0ab64e7e2a3af444958b019f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1617929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81080ecd2fdac61edb3b11a3bb2af5fb8ca674badbf722ebd2baa2d684dd25a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHL2307118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af4cf3702abbdb1907f0baed16421cf3a27071e6dab86f38e82f27ee2b52f51. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHL2307179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b79b8be81cc480a0a42b16303ced530fd77bbe1fe1c869f4579249194faafd9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1619758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafced964f2ffb432bd945e3f3ba04ad59af3a058e27261ccaf904eecec854c49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1617928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7e5b0a56397b98ee33c797f582cac2988e2eab6a031efa93331ee76d46819d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1619766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94351b3f00dcd6d16f26a014c44d5c191e529dbad74812db9eaf2a0365b2d66e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1619529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb167d0d73aae84ed08ab48b9756799ac5a3e4e4258dedf67a7abc7a599dc0f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1619772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e765b138783780007c6dc09b1d0e177cfaf853b33799531a977269300b5683a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2437858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a9c672ef8e601b88ca59f259b66c18f8b3c562a0531898181b3d70c7cfece. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2437859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87426f2baf6d446fbcd38cd0026338f52664060eccb1149aebba180f4330621. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2444261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4ab13acfa5984218c9196b43b41e46a792ab4679762e07c8f25b4dd6bfa787. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2444308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d28f99f924d23988c37c353b9c438479a3a0594c50638561bbdc5af68a2dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHG2350527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a10d50932a44d8b53d42607d24fe60bb9999b8da1f03d2cf9349416497001. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1629664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26208c089948440904468165f9f7bcea2908d46204e8a44b8361c81c10f3037. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1628165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84316a261fcb8c2a7570858afb72062d197c79465f2c506f416b1f8f55a97821. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1624782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0edc7dbcdd4ef17cf66fcb06bf560160132084418a74eeb234c272179eaa8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1625201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe176e26761f3203c23fe90999abe27b2f43dcb91a43782e7f56f64d65b24d884. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1625202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a36356166e931a9c17aea98d2bb398094819c6d1c57de09c41026330a797c2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1625203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84316a261fcb8c2a7570858afb72062d197c79465f2c506f416b1f8f55a97821. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1624782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949b9348e497beb4c8ad40951aef05a6d2b3426bb10724bb4fff834a9d198e38. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1622189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafced964f2ffb432bd945e3f3ba04ad59af3a058e27261ccaf904eecec854c49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1617928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cd7d16da891965e1bdc58f7045764bc11468191e43f55cd90e7fda2e9bb3a8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1617685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7194f3dbc7a70e3606bc8c1f72599d0c475d8c6f1360773f8a5e7be14295b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1615089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4be257c2e780489b1291274bf5d17dd6d9fcc0e7727e51dc2c08dd98df91f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEOX71100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f0107abb7833bda085dd7c9069e7c00341b0436405c7bc91dc3575beb9d3b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIP2492572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73297abef4fe27185794d7939297436c72b1bd6362500fbe68b5c626e5d00665. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIP2491781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56232c2d0ca8fa0ae3709a50033fc84b2eb36ec359b211dc068234a92619eaf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH6S1900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc16d9ef01bb444715d95ca2bab2b65c609b8243db5eb06c370f4798c10de16. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US43C1627635.